Innovative improvement of circulatory arrest technique in acute stanford type A aortic dissection

Objective Total aortic arch replacement and stented elephant trunk surgery is an important surgical method for acute type A aortic dissection, and the short, middle, long term curative effect has been recognized by more and more experts at home and abroad. Circulatory arrest was an independent risk factor for postoperative complications and mortality in patients with type A aortic dissection. The aim of this article is to observed the effection of a new technology to block aortic arch, whicn can shorten the circulatory arrest time to 2 minutes and avoid harm of circulatory arrest on patients. Methods From May 2016 to February 2017, 68 patients with acute type A aortic dissection were divided into the conventional group and the modified group. All the patients underwent total arch replacement and stented elephant trunk surgery. The rectal temperature of the conventional group was 25℃ and circulatory arrest time was 20 min. While the rectal temperature of the modified group was 28℃ and and circulatory arrest time was 2 min. Results In the conventional operation group, 3 patients died after operation while all the patients in the modified group were cured and discharged. There are no differences between the two groups in the time of cardiopulmonary bypass(CPB) and heart arrest time(P>0.05). There are Significant differences in CPB time, circulatory arrest time, postoperative awake time, intubation time, amount of blood used, the amount of drainage during the first two days after operation, the time staying in ICU and the postoperative time in hospital. And the modified group was much better.(P<0.05) Conclusion The results of new technology blocking aortic arch in the patients with acute type A aortic dissection are better than the conventional surgical approach during the perioperative period. This technology is simple and effective. It is worth promoting. Key words: Aortic Dissection; Moderate hypothermic circulatory arrest